Hydraulic Quick Coupler Question

[PHPaul]

Can you mix and match pin type QCs with ball type? Female on tractor is pin, males I have on hand are Pioneer/Ball type

 

[TheOldHokie]

Can you mix and match pin type QCs with ball type? Female on tractor is pin, males I have on hand are Pioneer/Ball type

Yes. As long as they are the same size and series they interoperate.

Dan

 

[PHPaul]

Yes. As long as they are the same size and series they interoperate.

Dan

Thanks.

 

[WI_Hedgehog]

I'll second what @TheOldHokie said, they tend to press against each other just fine and despite a few small differences "it works."

The differences are pin are able to flow more fluid due to their concave shape, and they tend to seal better and not leak after being disconnected. Ball tend to leak fluid past the ball when disconnected and therefore shouldn't suffer hydraulic lock when the temperature changes, as far as I understand it, and if they do lock up ya smack them with wood and it's all good.

My big balls are new and shiny so they didn't leak for as much use as they got (which is virtually none), and a few of the well-used pins I inherited spray like an excited puppy, so don't take the previous "how things are intended to work" paragraph as "how things actually work."

 

[TheOldHokie]

I'll second what @TheOldHokie said, they tend to press against each other just fine and despite a few small differences "it works."

The differences are pin are able to flow more fluid due to their concave shape, and they tend to seal better and not leak after being disconnected. Ball tend to leak fluid past the ball when disconnected and therefore shouldn't suffer hydraulic lock when the temperature changes, as far as I understand it, and if they do lock up ya smack them with wood and it's all good.

My big balls are new and shiny so they didn't leak for as much use as they got (which is virtually none), and a few of the well-used pins I inherited spray like an excited puppy, so don't take the previous "how things are intended to work" paragraph as "how things actually work."

There is a misconception here. The poppet style dont flow more fluid.

The ball type will flow the same rate but with a higher pressure drop. That means more heat and wasted horsepower at the pump.

 

[WI_Hedgehog]

There is a misconception here. The poppet style dont flow more fluid.

The ball type will flow the same rate but with a higher pressure drop. That means more heat and wasted horsepower at the pump.

Thanks for the feedback. Yeah, looking further it does seem to depend. Poppet could even flow less fluid due to the internal poppet valve.

Poppet-Type Quick Couplings: What You Need to Know

Discover essential information about poppet-type quick couplings, including their benefits, applications, and maintenance tips to optimize your systems!

cntopa.com

Are these hydraulic fittings interchangeable?

Can someone tell me if these 2 male hydraulic fittings are interchangeable? My MX5400 rear remotes have Pioneer couplers. The male fitting is a Pioneer 8010-4 1/2-14 NPTF as seen on the left of the photo. The male fitting that came on the hydraulic hose of my Del Morino flail mower is a...

www.orangetractortalks.com

https://forums.yesterdaystractors.com/threads/pioneer-hydraulic-coupler-style.1442320/#post-9128789

 

[Runs With Scissors]

My big balls are new and shiny

He said “my big balls……."

 

[TheOldHokie]

https://forums.yesterdaystractors.com/threads/pioneer-hydraulic-coupler-style.1442320/#post-9128789

Destroked is suffering from the same misconception. Flow rating is based on pressure drop and there is no standard for that. One OEM may decide to use 50 PSI for their rating and another might use 100 .PSI. There is also no standard for internal valve design so a coupler from one OEM may outperform the same size and style from another. Thats why you look at the OEMs pressure drop graph when evaluating performance. That is unambiguous.

Dan

 

[WI_Hedgehog]

.... Flow rating is based on pressure drop and there is no standard for that. One OEM may decide to use 50 PSI for their rating and another might use 100 .PSI. There is also no standard for internal valve design so a coupler from one OEM may outperform the same size and style from another. Thats why you look at the OEMs pressure drop graph when evaluating performance.

Okay, that also helps. Pressure drop graphs...heck, I'm happy just finding couplers in stock and affordably as the two are seemingly mutually exclusive. (Which is whyI'm happy to have heard of Valparaiso.)

 

[TheOldHokie]

Okay, that also helps. Pressure drop graphs...heck, I'm happy just finding couplers in stock and affordably as the two are seemingly mutually exclusive. (Which is whyI'm happy to have heard of Valparaiso.)

That graph is for 4SRHF couplers and straight off the Faster website. You will find just about every OEM publishes that data for both couplers and valves.

My point is there is no standard for pressure drop and the OEM is free to choose any point on the flow axis that they want to cite as a "flow rating".

Dan

 

[TheOldHokie]

That graph is for 4SRHF couplers and straight off the Faster website. You will find just about every OEM publishes that data for both couplers and valves.

My point is there is no standard for pressure drop and the OEM is free to choose any point on the flow axis that they want to cite as a "flow rating".

Dan

It was a slow night and I went back and reread the ISO 5675 and ISO 7241 standards. A few interesting observations:

1. This standard is specific to agricultural applications
2. It applies to 1/2" and 3/4" body sizes only
3. It incorporates ISO 7241 by reference for all but a few minor dimensional and operational requirements.
4. It mandates that couplers with spherical and conical valves interoperate in all regards.
5. It specifies a maximum pressure drop of .23 MPa (50 PSI) at 40 lpm (10.5 GPM) for 1/2" body size and 75 lpm (20 GPM) for 3/4" body size. That applies to both conical and spherical valves.

1. This standard applies to a broad range of applications
2. It incorporates all requirements of ISO 5675 by reference
3. It specifies the dimensional and operational requirements of ISO 5675, ISO 7241 A, and ISO 7241 B couplers
4. It does not specify any requirement on valve tip shape
5. It requires that all coupIers of the same series and body size interoperate regardless of the shape of the valve tip.
6. It imposes no flow requirement for any body size or series.